Pontiac into truck motor mount pics - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Longhorn Man · 05-05-2002, 04:41 PM

Some one did some good work under the hood of this pig. For those unaware, this would be the Pontiac 350 in my '70 one ton Longhorn. The comparison pics are the proper chevy 350 in my '69 1/2 ton GMC.
The motor mount towers seem to hold the motor lower in the frame, which since the Pontiac has a higher deck height, this is a good thing. The towers are also longer...from front to back.
The Chevy engine is mounted in the 2 forwasd holes, while the Pontiac is taking the forward AND the rear hole.
Some one did there homework here.
Is there a chance that these towers are 4X4 towers? How about big block towers?
Here's the pics;
These are all driver side pics.
Here is the Longhorn...

same angle in the GMC....

See how low this tower seems to hold it...lower and further out.

compaired to the chevy mounted engine.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

Johns70 · 05-05-2002, 04:55 PM

those are both big block towers the pontiac is sitting on 72 bb towers and yor gmc is sitting on 67-71 towers thats why the motor mounts rub the frame tower a little.hope this helps.

------------------
project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop

imaindianoutlaw · 05-05-2002, 04:56 PM

Where in the hell did they get those mounts and I can not understand how the mount bolts up to it?

------------------
Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr

Longhorn Man · 05-05-2002, 05:01 PM

Johns70, you sure bout the GMC towers? I had the exact same ones in my old Longhorn, and it was an unmollested rig.
Indian....give more detail on what you're looking at, and I'll zoom in on it a little better.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

Johns70 · 05-05-2002, 05:09 PM

the engine mount bolts to the front two holes and the bottom one angles back and bolts to the back hole.if this is the case it's a big block mount 67-71.i just rebuilt my bb motor and i switched from the late to the newer mounts like your pontiac motor has.

------------------
project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop

Johns70 · 05-05-2002, 05:24 PM

i looked a little closer and on the gmc it has the rubber under the mount also, if it has a large hole in the tower it is definatley a bb mount.

------------------
project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop

Longhorn Man · 05-05-2002, 05:27 PM

Interesting...can anyone show me a small block tower then?

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

Johns70 · 05-05-2002, 05:37 PM

they make two different towers for the small block one set for the front mounting holes and another set for the back mounting holes.they look simalar to the bb towers, instead of angleing back they go staight down to lower hole that sits in line with the top two holes,and if i remember right the bolt hole that ataches the rubber mount to the tower is small dia.and off subject the 292 six uses one tower in front and one tower in back mount, and the 250 six uses the same on both sides i think, its been so long since i did any six cycle and small bock stuff. hope this helps

------------------
project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop

Longhorn Man · 05-06-2002, 10:48 AM

ttt, anyone have pics of the proper small block towers?

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

**Desert Rat** · 05-06-2002, 11:01 AM

I see a set of 68-71 BB towers,and a set of 73 up style-they look similar to the 72's

*Fast68Chevy* · 05-06-2002, 02:24 PM

72bb towers have rounded top flange corners- not square ones like in 73-up for all engines,
73-up BB ones are roughly 1/2" shorter than SB ones in length, will have to measure my 76 BB ones ot make sure of that and compare ot all my 73-80 SB ones.

72 BB oens are one of a kind, go compare 72 bb ones to 73-up ones and you wil see what i mean

what towers are those in the GMC ? 68-71 BB ?? or V-6 ones ?

[This message has been edited by Fast68Chevy (edited May 06, 2002).]

Longhorn Man · 05-06-2002, 07:24 PM

In the GMC, I had thought they were small block. The old Longhorn had the same ones too...now that i think about it, the GMC's left tower if from the Longhorn, and the right one was in there when i bought it.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

>X< · 05-06-2002, 07:52 PM

they sure look a helluva lot better than the mounts on my pontiac 350 in my 71, mine are homeade and look like crap, but they do the job i guess, my motor sits a little higher i think though

Longhorn Man · 05-06-2002, 07:56 PM

I wouldn't wanna go much higher than this one...

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

imaindianoutlaw · 05-06-2002, 09:04 PM

Find a truck where the pontiac motor still uses a fan shroud!

------------------
Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr

Longhorn Man · 05-06-2002, 09:06 PM

It's all coming out anyways...

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio

imaindianoutlaw · 05-07-2002, 08:00 AM

Not for me! Its all goin in some day? Talked to the wife last night, and was talking about just getting a loan to buy a truck? If I build one I will have like 20,000 into the truck easy! I am very picky with my vehicles, I do it right or dont do it. Its never cheap! But I still have this 428 to use, os if I buy a nice truck I will still use this motor at some point!

------------------
Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr

05-05-2002, 04:41 PM	#1
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Pontiac into truck motor mount pics Some one did some good work under the hood of this pig. For those unaware, this would be the Pontiac 350 in my '70 one ton Longhorn. The comparison pics are the proper chevy 350 in my '69 1/2 ton GMC. The motor mount towers seem to hold the motor lower in the frame, which since the Pontiac has a higher deck height, this is a good thing. The towers are also longer...from front to back. The Chevy engine is mounted in the 2 forwasd holes, while the Pontiac is taking the forward AND the rear hole. Some one did there homework here. Is there a chance that these towers are 4X4 towers? How about big block towers? Here's the pics; These are all driver side pics. Here is the Longhorn... same angle in the GMC.... See how low this tower seems to hold it...lower and further out. compaired to the chevy mounted engine. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-05-2002, 04:55 PM	#2
Johns70 Registered User Join Date: Dec 2001 Location: Spring Creek, nevada. U.S.A. Posts: 456	those are both big block towers the pontiac is sitting on 72 bb towers and yor gmc is sitting on 67-71 towers thats why the motor mounts rub the frame tower a little.hope this helps. ------------------ project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop __________________ 69 chevy short wide box project 70 GMC jimmy project

05-05-2002, 04:56 PM	#3
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Where in the hell did they get those mounts and I can not understand how the mount bolts up to it? ------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO 1956 Pontiac 2 dr __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

05-05-2002, 05:09 PM	#5
Johns70 Registered User Join Date: Dec 2001 Location: Spring Creek, nevada. U.S.A. Posts: 456	the engine mount bolts to the front two holes and the bottom one angles back and bolts to the back hole.if this is the case it's a big block mount 67-71.i just rebuilt my bb motor and i switched from the late to the newer mounts like your pontiac motor has. ------------------ project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop __________________ 69 chevy short wide box project 70 GMC jimmy project

05-05-2002, 05:24 PM	#6
Johns70 Registered User Join Date: Dec 2001 Location: Spring Creek, nevada. U.S.A. Posts: 456	i looked a little closer and on the gmc it has the rubber under the mount also, if it has a large hole in the tower it is definatley a bb mount. ------------------ project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop __________________ 69 chevy short wide box project 70 GMC jimmy project

05-05-2002, 05:01 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Johns70, you sure bout the GMC towers? I had the exact same ones in my old Longhorn, and it was an unmollested rig. Indian....give more detail on what you're looking at, and I'll zoom in on it a little better. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-05-2002, 05:27 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Interesting...can anyone show me a small block tower then? ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-05-2002, 05:37 PM	#8
Johns70 Registered User Join Date: Dec 2001 Location: Spring Creek, nevada. U.S.A. Posts: 456	they make two different towers for the small block one set for the front mounting holes and another set for the back mounting holes.they look simalar to the bb towers, instead of angleing back they go staight down to lower hole that sits in line with the top two holes,and if i remember right the bolt hole that ataches the rubber mount to the tower is small dia.and off subject the 292 six uses one tower in front and one tower in back mount, and the 250 six uses the same on both sides i think, its been so long since i did any six cycle and small bock stuff. hope this helps ------------------ project 70 chev swb rebuilt 396bb{402}rebuilt th-400 3.73 limited slip 4/5 drop __________________ 69 chevy short wide box project 70 GMC jimmy project

05-06-2002, 10:48 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	ttt, anyone have pics of the proper small block towers? ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-06-2002, 11:01 AM	#10
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	I see a set of 68-71 BB towers,and a set of 73 up style-they look similar to the 72's

05-06-2002, 02:24 PM	#11
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	72bb towers have rounded top flange corners- not square ones like in 73-up for all engines, 73-up BB ones are roughly 1/2" shorter than SB ones in length, will have to measure my 76 BB ones ot make sure of that and compare ot all my 73-80 SB ones. 72 BB oens are one of a kind, go compare 72 bb ones to 73-up ones and you wil see what i mean what towers are those in the GMC ? 68-71 BB ?? or V-6 ones ? [This message has been edited by Fast68Chevy (edited May 06, 2002).]

05-06-2002, 07:24 PM	#12
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	In the GMC, I had thought they were small block. The old Longhorn had the same ones too...now that i think about it, the GMC's left tower if from the Longhorn, and the right one was in there when i bought it. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-06-2002, 07:52 PM	#13
>X< registered IWATA user Join Date: Feb 2002 Location: Baton Rouge Posts: 4,483	they sure look a helluva lot better than the mounts on my pontiac 350 in my 71, mine are homeade and look like crap, but they do the job i guess, my motor sits a little higher i think though __________________ -'63 Ford Fairlane 500 coupe, v8, auto, faded and rusty. awaiting built roller 302 and some flat black -'99 Honda Prelude. vtech/5spd. no pipe, no intake, bone stock. awaiting new top end. -01 GMC Yukon SLT 5.3 dented and scratched with a noisy tranny. Take off that Von Dutch hat before i stab you with a 000 Mack.

05-06-2002, 07:56 PM	#14
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I wouldn't wanna go much higher than this one... ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

05-06-2002, 09:04 PM	#15
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Find a truck where the pontiac motor still uses a fan shroud! ------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO 1956 Pontiac 2 dr __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.



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05-06-2002, 09:06 PM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	It's all coming out anyways... ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough? Columbus Ohio

05-07-2002, 08:00 AM	#17
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Not for me! Its all goin in some day? Talked to the wife last night, and was talking about just getting a loan to buy a truck? If I build one I will have like 20,000 into the truck easy! I am very picky with my vehicles, I do it right or dont do it. Its never cheap! But I still have this 428 to use, os if I buy a nice truck I will still use this motor at some point! ------------------ Charles W. Hein S. Williamsport PA imaindianoutlaw@yahoo.com REFRIGERATION TECH 1971 Rolling chassis FOR SALE 1963 Pontiac Tempest 1965 Pontiac GTO 1956 Pontiac 2 dr __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

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